It's been a hot space in recent years. Bwsift, another Chicago-based company in health benefits administration, was bought by insurer Aetna in 2014 for $400 million, not long after it raised $51 million from investors. Two years ago, Chicago-based Connected Health, another insurance-benefits tech company, was sold to Connecture, a publicly traded company in Brookfield, Wis., for $4.6 million.